Oil burner



July 19, 1932. H. 0. DUFAULT OIL BURNER Filed Aug. 19

OOOOOOOOOOO 0000000000 IDIDIDIDIE C'FO O Q O C O Z O Q O 'ww wtoz 0000000 000000 000 0 0 00 0000000000 OOOOOOOOOOOOOOOOOOODOO 0000000000 000000000000 0000000000oooooooooooi 000000000000 00000000000 OOOO OOOOOOOOOOOOOOQn 0 00 0 0 O QOG UGO O O Od qOd onu n mmoooooooo00000000090 00060 000???0 0 9 #m o o mo o o od o d o oio o O Q O O O IOI 01010 O H00 10 000.000. Po |0|0b Patented July 19, 1932 UNITED STATESPATENT OFFICE HOMER D. DUFAULT, OF EASTHAMPTON, MASSACHUSETTS, ASSIGNOROF TWO-TENTHS T ALDERIC FUGERE, TWO-TENTHS T0 EUCLIDE FUGERE, TWO-TENTHSTO ADAM BOUCHER, ONE-TENTH TO HENRY BERNIER, AND ONE-TENTH TO HIRAMBERNIER, ALL OF EASTHAMPTON, MASSACHUSETTS OIL BURNER Application filedAugust 19, 1931. Serial No. 558,136.

The invention aims to provide a new and improved oil burner of the typein which oil is gasifiedin a retort and discharged into gas channelsfrom which it is in turn discharged into spaces between perforatedcylinders, provision being made for mixing air with the g Burners of thegeneral type above mentioned necessarily embody gas-conducting portsfrom the retort to the gas channels or grooves, and prior to initialheating of the burner base, these ports of course conduct oil instead ofgas. The ports must be thoroughly cleaned from time to time in order toobtain efiicient burner operation, and while the invention provides aburner which requires only a minimum amount of cleaning, it is a furtherobject of said invention to so locate the ports as to facilitatecleaning thereof whenever advisable.

With the foregoing in view, the invention resides in the novel subjectmatter hereinafter described and claimed, description being accomplishedby reference to the accompanying drawing.

Fig. 1 is a vertical sectional view through a burner constructed inaccordance with my invention.

Fig. 2 is a top plan view of the burner badse, the wicks shown in Fig.1, being omitte Fig. 3 is a horizontal sectional view substantiallyonline' 33 of Fig. 1.

' Fig. 4 is a detail vertical sectional view on line 44 of Fig. 3showing the preferred shape of the ports.

The construction disclosed has proven to be efficient and desirable fromall standpoints and is therefore preferred, it being understood howeverthat even though said construction will be herein specificallydescribed, minor variations may be made.

The burner base B is of circular form and is substantially flat, saidbase being formed with a central air-conducting opening 5 which is openat both its upper and lower ends and occupies about one-third of thediameter of the base. Between the opening 5 1nd the peripheral edge 6 ofthe base B, is an annular air-conducting slot 7 which is open at boththe upper and lower sides of said base. Between this slot 7 and theopening 5, 'there is an annular retort groove 8 andagas groove 9.Between this slot 7 and the edge 6 of the base B, is another gas groove10. Both this groove and the groove 9 are much narrower than the retortgroove 8, and all of said grooves open through the upper slde of thebase B. While the grooves 9 and 10 remain upwardly open, a closure ring11 is provided to close the upper side of the groove 8, except when,cleaning the burner.

Four webs 12 and 13 span the air-conducting slot 7 and are integral withadjacent walls of the grooves 9 and 10. These webs unitarily connect theinner and outer concentrlc portions of the burner, and the webs 12 haveportions of gas-conducting ports 14 formed therein. Each'port 14 isstraight and leads from the retort groove'S to the gas groove 9 and thenthrough the web 12 to the gas groove 10, and as seen in Figs. 2 and 3,each port 14 is substantially tangential to the retort groove 8. Thisrelation of ports and groove, together with the width of the latter (8)are of great advantage when the ports must be cleaned, for it is an easymatter to enter a cleaning tool into the ports 14, through the ends ofthe latter which communicate with said groove 8.

A plurality of perforated metal cylinders 15, 16, 17 and 18 rest uponthe base B, the latter being appropriately shouldered to properlysupport said cylinders. The inner cylinder is in communication with theair-conducting opening 5 and is provided at its upper end with a closure19. The,cylinders 15 and 16 provide an annular space 20 communicatingwith the gas groove 9, cylinders 16 and 17 provide a similar space 21communicating with the air-conducting slot 7, and the cylinders 17 and18 provide a space 22 communicating with the gas groove 10. The spaces20 and 22 are open at their upper ends but the space 21 is closed by anappropriate ring 23.

To initially heat the burner to gasify the oil fed thereto through theinlet 24, wicks are preferably located in the grooves 9 and 10, When theoil is turned on, some of it runs from the retort groove 8 throughtheports 14 into the grooves 9 and 10. thereby saturating the Wicks 25, sothat by lighting these wicks, the burner will be initially heated. Assoon as the proper heat has been attained, the oil in the retort groove8 and the other grooves, becomes gasified, and the gas discharges intothe annular spaces 20 and 22 and here mixes with the air flowing fromthe interior of the cylinder 15' and from the space between thecylinders 16 and 17. The mixture of gas and air is so thorough that anextremely blue flame is obtained even when the oil is being fed withsuch rapidity that the flame reaches an unusual height above the burner.

The burner may be used for cooking stoves iv or heating stoves and mayembody only one unit such as that herein disclosed, or a plurality ofsaid units having their bases B suitably connected. 26 on the drawingdenotes portions of a bracket secured to the base B to support thelatter, and this bracket may also be secured to the base of anotherunit, if desired.

I claim 1. An oil burner comprising a substantially fiat circular basehaving a central air-conducting opening therethrough, said openingoccupying substantially one-third of the diameter of the base, said basebeing provided with an annular air-conducting slot there through betweensaid opening and its peripheral edge, said base being provided aroundsaid opening with a retort groove and with a gas groove between saidretort groove and said slot. said base having another gas groove betweenits peripheral edge and said slot, both of said gas grooves beingnarrower than said retort groove and upwardly open, a closure for theupper side of said retort groove, webs spanning said slot, said basehaving passages from said retort groove to said-gas grooves extendingthrough said webs, said passages being-substantially tangential to saidretort groove to facilitate cleaning and said retort groove beingprovided with an oil inlet; concentric perforated cylinder resting onsaid base and providing annular spaces which communicate with saidair-conducting slot and said gas grooves, the innermost cylinder beingin communication with said air-conducting opening, a closure for theupper end of said inner cylinder, and a closure for the cylinder-definedspaced above said air-conducting slot.

2. A burner base having a relatively wide annular retort groove,relatively narrow annular gas grooves around said retort groove,

an air-conducting slot between said gas grooves, webs spanning saidslot, and straight gas-conducting passages extending from said retortgroove through said webs to said gas grooves, said passages beingsubstantially tangential to said retort groove to facilitate cleaning ofsaid ports.

In testimony whereof I affix my signature.

HOMER D. DUFAULT.

